Write a C$++$ program ex$3\_$stringArray.cpp with the following code in the Visual Studio project or copy the following code into your IDE:

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#include

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#include

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$$

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using namespace std;

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$$

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$//$ADD CODE: Add prototypes for the unmix and decipher functions here

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$$

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int main$()$

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$\{$

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string code $="$K$*$@$*$R$*$S$*\backslash 037*$D$*$W$*$D$*$Q$*$B$*$H$*$R$*$D$*"$;

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cout $<<$ "Step $0$: $"<<$ code $<<$ endl;

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$$

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string unmixed;

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unmixed $=$ unmix$($code$)$;

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cout $<<$ "Step $1$: $"<<$ unmixed $<<$ endl;

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$$

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decipher$($unmixed$)$;

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cout $<<$ "Step $2$: $"<<$ unmixed $<<$ endl;

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$$

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return $0$;

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$\}$

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$$

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$//$Function unmix:

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$//$ Returns a new string containing

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$//$ only the even characters of string s

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string unmix$($string s$)$

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$\{$

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string ret;

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for $($int i $=0$; i $<$ s$.$length$()$; i$++)$

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$\{$

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$//$ADD CODE: if i is even

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$$

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$\{$

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$//$COMPLETE LINE: add the character at i onto ret

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ret $+=$

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$\}$

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$\}$

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return ret;

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$\}$

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$$

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$//$Function decipher:

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$//$ Implements a Caesar Cipher decoder

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$//$ every character in s will have $1$ added on to its value

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void decipher$($string &s$)$

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$\{$

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$//$ADD CODE: Write a for loop to that counts i from $0$ to the length of string s

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$$

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$\{$

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s$[$i$]=$ s$[$i$]+1$;

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$\}$

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$\}$

Complete this program by following the comments in the code.